package case1.core.observer;

/**
 * description:
 *
 * @author Yuanml on 2020/11/11 11:11
 */
public interface Observer {
    /**
     * description:
     * 观察者通知方法
     * @author Yuanml
     * @date 2020/11/11 上午11:11
     **/
    void update();
}
